

When Johnny Matlock whisks away a cold war secret from under the noses of Berlin's top secret agents, his every move is followed when he returns to England. His girlfriend Paula is kidnapped but her handbag is discovered at the scene of the crime by the aristocratic private eye, Duke Martin. Inside it he discovers the secret formula that the agents are searching for and tracks down her sister Paula. As Johnny grows frantic for the safe return of his girlfriend, Duke Martin plays a deadly game of double bluff with the enemy agents.
Acting
Honor Blackman juggling twin roles with actual effort
Production
Berlin location work punching above budget weight
Director
Henry Cass
Trivia, insights & behind the scenes
Freddie Mills, who plays Pat, was a former British light-heavyweight boxing champion — his casting added accidental physical credibility to a small role.
Henry Cass directed this same year as 'The Betrayal,' suggesting he had a profitable niche in low-budget British thrillers that aped bigger Hollywood espionage films.